xref: /openbmc/linux/include/linux/pkeys.h (revision 1c2dd16a)
1 #ifndef _LINUX_PKEYS_H
2 #define _LINUX_PKEYS_H
3 
4 #include <linux/mm_types.h>
5 #include <asm/mmu_context.h>
6 
7 #ifdef CONFIG_ARCH_HAS_PKEYS
8 #include <asm/pkeys.h>
9 #else /* ! CONFIG_ARCH_HAS_PKEYS */
10 #define arch_max_pkey() (1)
11 #define execute_only_pkey(mm) (0)
12 #define arch_override_mprotect_pkey(vma, prot, pkey) (0)
13 #define PKEY_DEDICATED_EXECUTE_ONLY 0
14 #define ARCH_VM_PKEY_FLAGS 0
15 
16 static inline bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey)
17 {
18 	return (pkey == 0);
19 }
20 
21 static inline int mm_pkey_alloc(struct mm_struct *mm)
22 {
23 	return -1;
24 }
25 
26 static inline int mm_pkey_free(struct mm_struct *mm, int pkey)
27 {
28 	return -EINVAL;
29 }
30 
31 static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
32 			unsigned long init_val)
33 {
34 	return 0;
35 }
36 
37 static inline void copy_init_pkru_to_fpregs(void)
38 {
39 }
40 
41 #endif /* ! CONFIG_ARCH_HAS_PKEYS */
42 
43 #endif /* _LINUX_PKEYS_H */
44